/*  1. 淡入淡出  过渡. name = faint */
.faint-enter-active,
.faint-leave-active {
  transition: opacity 0.8s ease-in-out;
}

.faint-enter-from,
.faint-leave-to {
  opacity: 0;
}

.faint-enter-to,
.faint-leave-from {
  opacity: 1;
}